Concrete pile-covering.



J. S. KIMB ALL'.

CONCRETE PILE COVERING. APPLICATION FILED 1.13.2, 1909.

Patented July 6, 1909.

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UNITED STATES PATENT OFFICE.

JOHN S. KIMBALL, OF SAN FRANCISCO, CALIFORNIA.

CONGRE TE FILE-COVERING.

Specification of Letters Patent.

Patented July 6, 1909.

Application filed March 2, 1909. Serial No. 480,830.

To all whom it may concern:

Be it known that 1, JOHN S. KIMBALL, citizen of the United States,residing in the city and county of San Francisco and State ofCalifornia, have invented new and useful Improvements in ConcretePile-Covering, of which the following is a specification.

My invention relates to a protecting coverlng for piles and likestructures, and means for applying and securing the same.

It consists of a series of substantially radially projecting bonds fixedin the pile, and a casing fitting over the ends of said bonding devices,being held in position so as to leave an annular space around the pile,into which concrete or other plastic material, which will subsequentlyharden, is placed; this material firmly embedding the bonding devices,and thus looking it in many places directly to the pile; the outercasing may afterward be removed, and subsequently reemployed.

My invention consists in combinations of parts, and detail-s ofconstruction which will be more fully explained by reference to theaccompanying drawings, in which Figure 1 is a view of the pile preparedfor coating. Fig. 2 shows the pile with the bonding device and theexterior casing. Fig. 3 shows the completed coated pile.

Many devices have been employed for protecting piles from the ravages ofthe teredo, or other marine worms or insects, and among these, concreteor similar material has been applied. The difficulty with suchapplications is that on account of its rigidity and brittleness, it hasnot been possible to secure it so that it will not break or flake offand leave the part exposed.

My invention is designed to accurately apply an even coating of suchmaterial around the pile, and to firmly lock it thereto at a great manypoints so that it cannot be broken or flaked off by rough contact fromthe outside.

As shown in the drawing, A represents the section of a pile sufficientto extend from high water mark to the mud in which the pile is to beembedded. Into this section I drive nails, spikes, or other bondingdevices 2 in any suitable or desired form so that they are fixed firmlyin the body of the pile. The

outer ends of these bonding devices are substantially at an equal evendistance from the center, and extend as far away from the pile as willequal the desired thickness of the material.

4; is a casing which may be made of metal or other suitable materialsufiiciently large to inclose the outer ends of the bonding devices 2.The casing l may have its edges disengageably interlocked, or otherwisesecured by flanges and bolts so that it can be subsequently removed.This casing l is fitted around the outer ends of the bonding devices 2,and is by them retained at the desired distance from the surface of thepile, thus forming an open space between the pile and the casing. Thisspace is then filled with the protective material 3, such as concrete orother plastic material, which can be packed into the space, and whichwill afterward set or harden. The casing will extend from a point belowthe mud into which the pile is driven to a point above high water mark,and when the protective coating 3 has been applied, it will cover thepile over this whole space. After it is properly set, the outer casing4t may be removed from it, or it may be allowed to remain, and if ofmetal would be gradually destroyed by the action of the water, and fromother causes, but in either case the protective coating remains, and isfirmly anchored to the pile at so many different points that it ispractically indestructible by the contact of floating vessels orfloating objects which might otherwise cause it to break and flake off.Such a coating will preserve the pile indefinitely.

Having thus described my invention, what I claim and desire to secure byLetters Patent is- 1. A protective coating for piles, and lookingdevices secured to the piles having their.

outer ends embedded in the coating.

2. A pile having radially projecting bonding devices driven into it, anda protective coating of plastic material which will afterward set orharden surrounding the pile and embedding the bonding devices.

3. The combination with a pile or like st ructure, of radiallyprojecting bonding devices having their inner ends driven into the pile,the outer ends projecting to approximately an equal distance therefrom,an exterior casing fitting over the ends of said bonding devices, andplastic material which 5 will afterward set or harden, filled into thecasing and en'ibedding the bonding devices. In testimony whereof I havehereunto set my hand in presence of two subscribing Witnesses.

JOHN S. KIMBALL.

Witnesses CHARLES A. PENFIELD, C. E. KIMBALL.

